extraneous whitespace in arguments for sub workflow job with java generator

  type: "job"
  name: "GenSGTDax"
  namespace: "scec"
  version: "1.0"
  id: "GenSGTDax_TEST"
  profiles:
    hints:
      executionPool: "local"
  arguments:
   - "-r 7214"
   - " "
   - "-gf gridout_TEST"
   - " "
   - "-o AWP_SGT_TEST.dax"
   - " "
   - "-sr moment.usc.edu"
   - " "
   - "-sp 0.2"
   - " "
   - "-mv 500.0"
  uses:
   -
    lfn: "gridout_TEST"
    type: "input"
    stageOut: true
    registerReplica: true
   -
    lfn: "AWP_SGT_TEST.dax"
    type: "output"
    stageOut: false
    registerReplica: false
 -
  type: "pegasusWorkflow"
  file: "AWP_SGT_TEST.dax"
  id: "AWP_SGT_TEST"
  arguments:
   - "--force"
   - " "
   - "--basename AWP_SGT_TEST"
   - " "
   - "--cleanup inplace"
  uses: []


this causes the planner to fail while planning for the sub workflow job with but now I get the error:

2021.10.29 14:41:42.187 PDT: [DEBUG] Arguments passed to SUBDAX Generator are --force --basename AWP_SGT_TEST --cleanup inplace AWP_SGT_TEST.dax
2021.10.29 14:41:42.188 PDT: [INFO] event.pegasus.code.generation dax.id CyberShake_Integrated_TEST-0 (0.079 seconds) - FINISHED
2021.10.29 14:41:42.188 PDT: [FATAL ERROR] java.lang.RuntimeException: Unable to generate code
at edu.isi.pegasus.planner.client.CPlanner.executeCommand(CPlanner.java:641)
at edu.isi.pegasus.planner.client.CPlanner.executeCommand(CPlanner.java:322)
at edu.isi.pegasus.planner.client.CPlanner.main(CPlanner.java:209)
Caused by: java.lang.RuntimeException: Unparsed component "" of the command line argument string: --force --basename AWP_SGT_TEST --cleanup inplace AWP_SGT_TEST.dax
at edu.isi.pegasus.planner.client.CPlanner.parseCommandLineArguments(CPlanner.java:958)
at edu.isi.pegasus.pl